Like I said in the Norwich match thread, strikers miss chances, even the very very best do. We were spoiled for a period under Pardew when Ba, Cissé and Remy seemed to score pretty much as soon as the ball was in the box, and since then it seems like it's criminal for a striker to miss a good chance. The time to worry is when your striker isn't even getting a sniff at goal or isn't involved with the game at all.